summarize this: The theory identifies four main leadership approaches: Telling: Directive and authoritative approach. The leader makes decisions and tells employees what to do. Selling: The leader is still the decision maker, but he communicates and works to persuade the employees rather than simply directing them. Participating: The leader works with the team members to make decisions together. He supports and encourages them and is more democratic. Delegating: The leader assigns decision-making responsibility to team members but oversees their work